63240720 has 40 divisors (see below), whose sum is σ = 196046976. Its totient is φ = 16864128.

The previous prime is 63240701. The next prime is 63240739. The reversal of 63240720 is 2704236.

It is an interprime number because it is at equal distance from previous prime (63240701) and next prime (63240739).

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×63240720² = 7998777332236800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131512 + ... + 131991.

Almost surely, 2^63240720 is an apocalyptic number.

63240720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63240720 is an abundant number, since it is smaller than the sum of its proper divisors (132806256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63240720 is a wasteful number, since it uses less digits than its factorization.

63240720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263519 (or 263513 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 63240720 is about 7952.4034102905. The cubic root of 63240720 is about 398.4118696162.

Adding to 63240720 its reverse (2704236), we get a palindrome (65944956).

The spelling of 63240720 in words is "sixty-three million, two hundred forty thousand, seven hundred twenty".